FP-CTR-502 and cFP-CTR-502 8 ni.com
Configuring Count-Input Channels
Channels 0–7 are count-input channels. In FieldPoint software,
you can configure each count-input channel to operate with
attributes and commands. In the Channel Configuration dialog
box, select attributes for each channel from the Attributes menu
and commands from the Commands menu. The following sections
describe the different attributes and commands you can select
when you are configuring the count-input channels. For more
information about using FieldPoint software, refer to the
FieldPoint software help file.

Terminal Count

To set the terminal count, enter a value from 0 to 65,535 in the
Value field. The default value is 65,535. When the count-input
channel exceeds its terminal count, the count resets to0 and
triggers any outputs associated with it. For more information about
associating outputs with a count-input channel, refer to the
Configuring Output Channels section. The count-input channel
also sends a count trigger to the next count-input channel if that
channel is set to use the previous channel as the count source.

Channel Status

In FieldPoint software, the [c]FP-CTR-502 reports one of the
following statuses: Successful or Overflow since last
read. The default channel status is Successful. If a count-input
channel exceeds the terminal count, the channel resets to 0 and
starts counting again, and the channel status changes to Overflow
since last read.

Count Source

Select one of the following count sources from the Value menu:
External Count Input, Previous Channel, 1kHz Reference,
or32 kHz Reference. Select External Count Input, 1 kHz
Reference, or 32kHz Reference to configure the channel so that
it counts low-to-high (off-to-on or rising-edge) transitions of the
count source.
Select Previous Channel if you want the channel to count the
number of times that the previous count-input channel reaches
itsterminal value and rese ts to 0. You can configure multiple
counters to operate as one large counter. You can slave Channel 1